Helps to mimic the "adjustPan" behaviour for a particular layout when its parent activity has the "adjustResize" behaviour.

MimicAdjustPanExtensions.kt

import android.animation.ObjectAnimator
import android.app.Activity
import android.view.View
import android.view.ViewGroup

fun ViewGroup.doOnPanRequest(f: (v: View, requestedTranslationY: Float) -> Unit) {
    val initTranslationY = translationY
    setOnApplyWindowInsetsListener { layout, insets ->
        (this.context as? Activity)?.window?.let { w ->
            w.currentFocus?.let { focusedView ->
                val focusedViewY = IntArray(2).also(focusedView::getLocationInWindow)[1]
                val focusedViewBottom = focusedViewY + focusedView.height
                val windowHeight = w.decorView.height

                val insetFromBottom = insets.systemWindowInsetBottom
                val distanceFromBottomToView = windowHeight - focusedViewBottom
                val deltaFromBottom = insetFromBottom - distanceFromBottomToView

                val isInsetOverlappingView = insetFromBottom > distanceFromBottomToView
                // if the inset isn't overlapping the view now maybe it will when we reset translationY
                val translationDelta = initTranslationY - layout.translationY
                val willInsetOverlapView = insetFromBottom > distanceFromBottomToView - translationDelta
                val newTranslationY = if (isInsetOverlappingView || willInsetOverlapView) {
                    // translate the layout up when deltaFromBottom is positive (isInsetOverlappingView == true)
                    // or down when delta is negative (willInsetOverlapView == true)
                    layout.translationY - deltaFromBottom
                } else {
                    initTranslationY
                }
                f(layout, newTranslationY)
            }
        } ?: f(layout, initTranslationY)
        insets
    }
    viewTreeObserver.addOnGlobalFocusChangeListener { oldFocus, newFocus ->
        requestApplyInsets()
    }
}

fun View.animateTranslationYChange(newTranslationY: Float, duration: Long) {
    ObjectAnimator.ofFloat(this, "translationY", newTranslationY).apply {
        this.duration = duration
        start()
    }
}